1. Tardigrade
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  3. Physics
  4. Heat is given to an ideal gas in an isothermal process. A. Internal energy of the gas will decrease. B. Internal energy of the gas will increase. C. Internal energy of the gas will not change. D. The gas will do positive work. E. The gas will do negative work. Choose the correct answer from the options given below:

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Q. Heat is given to an ideal gas in an isothermal process.
A. Internal energy of the gas will decrease.
B. Internal energy of the gas will increase.
C. Internal energy of the gas will not change.
D. The gas will do positive work.
E. The gas will do negative work.
Choose the correct answer from the options given below:

JEE MainJEE Main 2023Thermodynamics

Solution:

Sol. dQ=dU+dW
⇒dU=nCVdT
dU=0 (for isothermal)
∴U= constant
Also dQ>0 (supplied)
Hence dW>0